STRUCTURE OF STATIONARY STRONG IMBALANCED TURBULENCE

Journal Article · Tue Sep 01 00:00:00 EDT 2009 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/702/1/460; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)· OSTI ID:21333836

Beresnyak, A

In this paper, we systematically study the spectrum and structure of incompressible magnetohydrodynamic turbulence by means of high-resolution direct numerical simulations. We considered both balanced and imbalanced (cross-helical) cases and simulated sub-Alfvenic as well as trans-Alfvenic turbulence. This paper, extends numerics preliminarily reported in Beresnyak and Lazarian. We confirm that driven imbalanced turbulence has a stationary state even for high degrees of imbalance. Our major finding is that the structure of the dominant and subdominant Alfvenic components are notably different. Using the most robust observed quantities, such as the energy ratio, we believe we can reject several existing models of strong imbalanced turbulence.

• OSTI ID: 21333836
• Journal Information: Astrophysical Journal, Vol. 702, Issue 1; Other Information: DOI: 10.1088/0004-637X/702/1/460; Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
COMPUTERIZED SIMULATION
MAGNETOHYDRODYNAMICS
RESOLUTION
SPECTRA
TURBULENCE